The Smart Roadster Coupé's trunk hinges have plastic screw covers that tend to visibly deteriorate quite quickly. This STL file allows you to print replacement parts that can be inserted in place of the regular screw covers. The printed screw covers are not 100% identical in form to the regular screw covers, but they worked well enough for me. I've also uploaded the OpenSCAD file to allow you to make your own adjustments and improvements. Requires http://www.thingiverse.com/thing:8812